我正在使用 iperf 工具對兩台相同的電腦(Dell Blade Server M620)上的網路介面進行基準測試。兩者都給出了不同的結果。
- 在第一台機器上,我運行伺服器和客戶端:
伺服器==>iperf -s -B 172.17.250.200
Server listening on TCP port 5001 Binding to local address 172.17.250.200 TCP window size: 85.3 KByte (default) ----------------------------------------
新 shell 上的客戶端==> iperf -c 172.17.250.200 -u -i l -b 250m
,
WARNING:interval too small, increasing from 0.00 to 0.5 seconds -----------------------------------------------------------
Client connecting to 172.17.250.200, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 208 KByte (default)
------------------------------------------------------------
[ 3] local 172.17.250.200 port 56853 connected with 172.17.250.200 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 0.5 sec 7.45 MBytes 125 Mbits/sec
[ 3] 0.5- 1.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 1.0- 1.5 sec 7.45 MBytes 125 Mbits/sec
[ 3] 1.5- 2.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 2.0- 2.5 sec 7.45 MBytes 125 Mbits/sec
[ 3] 2.5- 3.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 3.0- 3.5 sec 7.43 MBytes 125 Mbits/sec
[ 3] 3.5- 4.0 sec 7.44 MBytes 125 Mbits/sec
[ 3] 4.0- 4.5 sec 7.46 MBytes 125 Mbits/sec
[ 3] 4.5- 5.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 5.0- 5.5 sec 7.45 MBytes 125 Mbits/sec
[ 3] 5.5- 6.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 6.0- 6.5 sec 7.45 MBytes 125 Mbits/sec
[ 3] 6.5- 7.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 7.0- 7.5 sec 7.45 MBytes 125 Mbits/sec
[ 3] 7.5- 8.0 sec 7.44 MBytes 125 Mbits/sec
[ 3] 8.0- 8.5 sec 7.46 MBytes 125 Mbits/sec
[ 3] 8.5- 9.0 sec 7.45 MBytes 125 Mbits/sec
[ 3] 9.0- 9.5 sec 7.46 MBytes 125 Mbits/sec
[ 3] 9.5-10.0 sec 7.44 MBytes 125 Mbits/sec
[ 3] 0.0-10.0 sec 149 MBytes 125 Mbits/sec`
在第二台機器上,我使用相同的配置運行,得到以下結果:
伺服器==>
iperf -s -B 172.17.250.190
新 shell 上的客戶端==>
iperf -c 172.17.250.190 -u -i l -b 250m
WARNING: interval too small, increasing from 0.00 to 0.5 seconds. ------------------------------------------------------------ Client connecting to 172.17.250.190, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 208 KByte (default) ------------------------------------------------------------ [ 3] local 172.17.250.190 port 59887 connected with 172.17.250.190 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 0.5 sec 3.00 MBytes 50.3 Mbits/sec [ 3] 0.5- 1.0 sec 7.45 MBytes 125 Mbits/sec [ 3] 1.0- 1.5 sec 7.45 MBytes 125 Mbits/sec [ 3] 1.5- 2.0 sec 7.45 MBytes 125 Mbits/sec [ 3] 2.0- 2.5 sec 7.05 MBytes 118 Mbits/sec [ 3] 2.5- 3.0 sec 2.95 MBytes 49.5 Mbits/sec [ 3] 3.0- 3.5 sec 2.96 MBytes 49.7 Mbits/sec [ 3] 3.5- 4.0 sec 2.95 MBytes 49.5 Mbits/sec [ 3] 4.0- 4.5 sec 2.97 MBytes 49.8 Mbits/sec [ 3] 4.5- 5.0 sec 2.96 MBytes 49.7 Mbits/sec [ 3] 5.0- 5.5 sec 2.88 MBytes 48.3 Mbits/sec [ 3] 5.5- 6.0 sec 2.88 MBytes 48.3 Mbits/sec [ 3] 6.0- 6.5 sec 2.89 MBytes 48.5 Mbits/sec [ 3] 6.5- 7.0 sec 2.92 MBytes 49.0 Mbits/sec [ 3] 7.0- 7.5 sec 2.94 MBytes 49.3 Mbits/sec [ 3] 7.5- 8.0 sec 2.93 MBytes 49.2 Mbits/sec [ 3] 8.0- 8.5 sec 2.95 MBytes 49.5 Mbits/sec [ 3] 8.5- 9.0 sec 2.95 MBytes 49.5 Mbits/sec [ 3] 9.0- 9.5 sec 2.94 MBytes 49.3 Mbits/sec
為什麼兩台機器結果有差異,它們是相同的機器。一台機器顯示穩定的 125Mbit/sec 流量,另一台機器顯示流量波動。
我還嘗試在兩台機器上使用 iperf 使用 ip 位址“127.0.0.1”,但我仍然面臨類似的問題。在環回的情況下,我認為流量不會通過網卡,但環回仍然存在波動。兩台機器都運行 Ubuntu 12.04 Server 64 位元。任何可能出錯的幫助將不勝感激。